Set-trigger for gun-locks.



No. 771,806. PATENTED OCT. 11, 1904.

' :0. BROWN.

s31 TRIGGER FOR GUN LOCKS.

APPLICATION FILED JAN. 2, 1904.

NO MODEL.

W/ TNESSIES Q //v1//v7'02 A TT'v Patented October 11, 1904.

PATIENT @rrrcn.

DANIEL BROWN, OF CRANSTON, RHODE ISLAND.

SET-TRIGGER FOR GUN-LOCKS.

SPECIFIGA TION forming part of Letters Patent No. 771,806, dated October 11, 1904.

Application filed January 2, 1904.

To all whom, it wmy concern.-

Be it known that I, DANIEL BROWN, a citizen of the United States, residing at Cranston, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Set-Triggers for Gun-Locks, of which the following is a specification, reference being had therein to the accompanying drawings.

Like letters indicate like parts.

Figure 1 shows, partly in side elevation and partly in central longitudinal section, my im proved set-trigger for gun-locks. Fig. 2 is a perspective view of the trigger and the settrigger sear. Fig. 3 is a View, partly in side elevation and partly in central longitudinal section, of the firing-bolt and spring, the main scar and its spring, and the portions of the frame or case in which they are respectively mounted and supported.

My invention relates to the set-triggers of gun-locks; and it consists in the novel construction and combination of the several elements, as hereinafter described, and specifically set forth in the claims.

In the drawings, A represents the frame or case of the gun-lock.

'B is the firing-bolt, mounted, as usual, in the case or frame. The bolt B is actuated by the spiral spring C and is held and liberated by the main sear D in the well-known manner.

E is the spring for the main sear D, one end being mounted in a notch in the frame and the other end being mounted in a notch in the sear D. The scar D is pivoted at a to the frame A.

The trigger is shown at F and has a transverse hole 7), through which a pin 0 passes, thus pivotal] y mounting the trigger F to the frame or case A.

G is the usual guard for the trigger F.

The inner end of the trigger F has the integral head or knock-off d, substantially rectangular in shape. This head (Z has a transverse lip or flange e and also a transverse notch or seat f. The inner surface of the lip or flange e is slightly beveled. The head dis made with a circular socket, as seen in Fig. l, the bottom of which socket is provided Serial No. 187,567. (No model.)

with a concentric socket of a smaller diameter, as fully illustrated in Fig. 1.

H is a set-trigger sear having a transverse hole 9, the curved transverse catch or flange 7b, and the forward extension a. The inner 'surface of the flange it is slightly beveled.

This sear H also has a circular socket 7', as shown in Figs. 1 and 2. The sear H is pivotally mounted on the frame or case A by a pin is, which passes through the hole g.

A spindle I is surrounded by a spiral spring J. One end of the spindle I is inserted in the smaller socket in the head (Z of the trigger F and the opposite end of said spindle enters into the socket j of the sear H. The spiral spring J has one end bearing against the internal annular shoulder of the circular socket of the head (Z of the trigger F and its opposite end bearing against the bottom of the circular socket 7' of the sear H. As the axial line of the said socket of the head (Z of the trigger F is not in the same direction as the axial line of the socket of the sear H, but said two axial lines are at a slight angle in their relation to each other, the spiral spring J is somewhat curved or bent, as is apparent in Fig. 1. Therefore the spiral spring J under tension exerts its force in two directions, one being in the longitudinal line of the spindle I and the other being laterally at an angle with the extension 2' of the sear H.

The sear H is set in operative position by engaging its beveled catch it with the beveled lip or flange e, as shown in Fig. 1, said catch it being in contact with the upper edge of the lip or flange e. The outer end of the extension of the sear H enters and engages the notch f of the trigger F.

A set-screw K passes through the frame or case A and its inner end bears against the under side of the extension of the sear H, and thus the angular position of the sear H of the trigger F may be adjusted, thus determining the degree or depth to which the flanges e and 7t engage each other.

When the parts are in operative position, as seenin Fig. 1, a finger-pull on the trigger F causes the lip or flange e of the head (Z of the trigger F to rise, and so to slip out of engagement with the catch 7b of the sear H,

whereupon the sear I-I being now free to act is forced forward by the expansion of the spiral spring J, thus adding the power of the liberated spring J to the power and momen tum of the head (Z of the trigger F given by the finger-pull. Thus the head cl of the trigger F comes into sudden and violent contact with the contiguous projection of the main sear D, and thereby the upper end of the sear D is knocked off from the catch Z of the base on of the hammer L. The bolt B then acts in the well-known manner by the force of the spiral spring 0. The scar H is reset for use again by a forward pressure of the finger or thumb against the back side of the trigger F, which movement of the trigger causes a rearward oscillation of the head d of the trigger F upon the pin 0 and bears down the extension of the sear H, which is in the notch f of the trigger F, and brings the catch it of the sear H into engagement with the lip or flange c of the head d of the trigger F. The bend of the spiral spring exerts a downwardlydirected pressure to hold said extension 41 in forcible contact with the notch f of the trigger F. The end of the spindle I, striking the bottom of the socket j of the sear H, serves as a stop when the trigger F is pressed forward for resetting, as above described.

By means of the set-screw K this set-trigger may be adjusted to any requisite degree to give such a pull-off as each individual may prefer.

This invention constitutes a very simple and efficient device for a hair-trigger for rifles which have either the bolt action or the common hammer action. As is well known, the construction of all bolt actions is such that it is necessary for safety to have the pull quite hard, and this detracts from the utility of such rifles when used for fine shooting or target practice. My improvement obviates that difficulty. The length of the spiral spring is not sufiicient to counteract to any noticeable degree the action of the main sear. The momentum of the knock-off is not impeded by any stop-pin or counteraction-spring common in other systems. The striking effect is therefore superior. The ample leverage provided by my construction and the positions of the pivots as arranged combine to give an easy release of the sear of the set-lock. The trigger being balanced byits enlarged upper portion or head and the position of the pivots in their relation to each other combine to render the lock safer from being accidentally jarred off than some other systems. The parts are fewer and simpler than in the devices hitherto employed. The light spiral spring does not produce as much friction at the points of contact as is caused by the stiff springs used in other constructions for the same purpose. The spindle upon which the spring is supported controls the engagement, and the momentum of the well-balanced trigger reinforces the knock-off and acts in unison therewith when the blow is given. The point of release has but little strain and requires only a slight bearing. All these features contribute to a delicate and sensitive pull-off. When the sear H is not set and is therefore inoperative, the other parts act in their usual manner.

The spiral spring used in my improved construction is much less expensive than the flat springs commonly used in set-locks which employ the knock-off principle. The length of the spiral spring is so limited that it does not oppose the action of the main sear and it does not require any stop to prevent a counteraction of the main sear. The spindle gives definite direction to the strain of the tension, and it is of such length that it formsa stop when the set is in use, which feature is essential to the uniformity of the repeated action of the parts.

I claim as a novel and useful invention and desire to secure by Letters Patent 1. In a gun-lock having a main sear,the combination therewith of a pivotally-mounted trigger provided with a head in which there is a socket, a set-trigger sear pivotally mount- 7 ed and provided with a socket, a spiral spring extending between said trigger and the lastnamed sear and having its ends mounted in said sockets respectively, and means for engaging said trigger and second sear to each other, substantially as described.

2. In a gun-lock having a main sear,the combination therewith of a pivotally-mounted trigger provided with a head which has a lip or flange and a socket, a set-trigger sear pivotally mounted and provided with a socket and with a catch engageable with said lip or flange, and a spiral spring mounted in said sockets respectively and extending between said trigger and second sear, substantially as described.

3. In a gun-lock havingamain sear,the combination therewith of a pivotallymounted trigger which has a head provided with a socket and with a notch, a pivotally-mounted set-trigger sear having an extension engaging with said notch, means for engaging said trigger and second sear, and a spiral spring extending between said trigger and second scar and having its ends seated in said sockets respectively, substantially as specified.

4. In a gun-lock having a main sear, the combination therewith of a pivotally-mounted trigger provided with a socket, a pivotallymounted settrigger sear having a socket, means adapted to engage said trigger and second sear, a spiral spring between said trigger and second sear whose ends are mounted in said sockets respectively, and a spindle extending through said spiral spring longitudinally and having its ends extending into said sockets respectively, substantially as specified.

5. In a gun-lock having a main sear, the combination therewith of a pivotally-mounted trigger, a head integral with said trigger and having a lip, a notch and also a circular socket which socket at its inner end has an annular shoulder and opens into a concentric circular socket of less diameter than that of the firstnamed socket, a pivotally-mounted set-trigger sear having a socket and also having a catch engageable with said lip and an extension engaging with said notch, a spiral spring extending between said trigger and second sear with its ends seated in the socket of the second sear and in the first-named socket of said trigger-head, and a spindle extending through said spiral spring and having one end inserted in the second-named socket of the trigger-head and its opposite end inserted in the socket of the second sear, substantially as described.

6. In a gun-lock, the combination of a pivotally-mounted trigger, a head integral with said trigger and having a notch, a lip or flange and a circular socket whose inner end is reduced in diameter to form an annular shoulder, a pivotally-mounted set-trigger sear having a socket, an extension engaging with said notch and a catch engageable with said lip or flange, said sockets in the trigger-head and in the sear being so directed that their axes are not coincident but disposed at an angle one to the other, a spindle having its ends seated in said sockets respectively, and a spiral spring surrounding said spindle and longitudinally curved so that its ends are seated in said sockets respectively and arranged to press its bent end against the extension of the sear, substantially as specified.

7. In a gun-lock the combination of a pivotally-mounted trigger, a head integral with said trigger and having an engaging lip and a socket, a pivotally-mounted set-trigger sear having a socket and also a catch engageable with said lip, a spiral spring extending between said trigger and sear and having its ends seated in said sockets respectively, and a spindle extending from the trigger to the sear through said spiral spring and serving as a stop in resetting, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

DANIEL BROWN.

Witnesses:

JOSEPH A. TURCK, HOWARD A. LAMPREY. 

